package JDBC;

import com.alibaba.druid.pool.DruidDataSource;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DBUtil {
    //创建连接池
    private static DruidDataSource druidDataSource;

    static {
        druidDataSource = new DruidDataSource();
        druidDataSource.setUrl("jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true");
        druidDataSource.setUsername("root");
        druidDataSource.setPassword("root");

        druidDataSource.setInitialSize(5);//初始连接数量
        druidDataSource.setMaxActive(20);//最大连接数

    }

    public static Connection getConnection() throws SQLException {
        return druidDataSource.getConnection();
    }

    /*
    static {
        //驱动加载一次即可
        try{
            Class.forName("com.mysql.cj.jdbc.Driver");
        } catch(ClassNotFoundException e) {
            e.printStackTrace();
        }
    }

    //获取与本地MySQL数据库的连接
    public static Connection getConnection() throws SQLException {
        return DriverManager.getConnection("jdbc:mysql://localhost:3306/tedu?characterEncoding=utf8&useSSL=false&serverTimezone=Asia/Shanghai&rewriteBatchedStatements=true",
                "root",
                "root");
    }

     */
}
